Tag Archives: Physics

Q/A of the Day ~ How Can You Create a Universe From Nothing?

“How can you create a universe from nothing?

Universe Closed
Universe Closed (Photo credit: brianarn)

Well if you calculate the total matter of the universe it is positive. If you calculate the total energy of the universe it is negative because of gravity. Gravity has negative energy. When you add the two together what do you get? Zero, so it takes no energy to create a universe. Universes are for free. A universe is a free lunch.

And then you may say to yourself well that can’t be right because positive and negative charges don’t cancel out, therefore, how can the universe be made out of nothing. Well if you calculate the total amount of positive charge in the universe and calculate the total amount of negative charge in the universe and you add it up what do you get? Zero, the universe has zero charge.

Well what about spin? Galaxies spin, right? But they spin in all directions. If you add up all the spins of the galaxies what do you get? Zero, so in other words, the universe has zero spin, zero charge and zero matter energy content. In other words, the universe is for free.”

Michio Kaku:

Quote of the Day 31 January 2014 – Compulsion

English: The photograph image of Nikola Tesla ...
English: The photograph image of Nikola Tesla (1856-1943) at age 34. (Photo credit: Wikipedia)

I am credited with being one of the hardest workers and perhaps I am, if thought is the equivalent of labour, for I have devoted to it almost all of my waking hours. But if work is interpreted to be a definite performance in a specified time according to a rigid rule, then I may be the worst of idlers. Every effort under compulsion demands a sacrifice of life-energy. I never paid such a price. On the contrary, I have thrived on my thoughts.
Nikola Tesla

 

 

English: *100 Serbian dinar banknote, 2006 iss...
English: *100 Serbian dinar banknote, 2006 issue, front. From the site of the National bank of Serbia (http://www.nbs.rs/) (Photo credit: Wikipedia)

Quote of the Day 14 January 2014 – Time

English: at the 2011 Texas Book Festival, Aust...
English: at the 2011 Texas Book Festival, Austin, Texas, United States. (Photo credit: Wikipedia)

“…unfortunately, it’s true: time does heal. It will do so whether you like it or not, and there’s nothing anyone can do about it. If you’re not careful, time will take away everything that ever hurt you, everything you have ever lost, and replace it with knowledge. Time is a machine: it will convert your pain into experience. Raw data will be compiled, will be translated into a more comprehensible language. The individual events of your life will be transmuted into another substance called memory and in the mechanism something will be lost and you will never be able to reverse it, you will never again have the original moment back in its uncategorized, preprocessed state. It will force you to move on and you will not have a choice in the matter.”
Charles YuHow to Live Safely in a Science Fictional Universe

Quote of the Day 5 December 2013 – Flower

Richard Feynman
Cover of Richard Feynman

“I have a friend who’s an artist and has sometimes taken a view which I don’t agree with very well. He’ll hold up a flower and say “look how beautiful it is,” and I’ll agree. Then he says “I as an artist can see how beautiful this is but you as a scientist take this all apart and it becomes a dull thing,” and I think that he’s kind of nutty. First of all, the beauty that he sees is available to other people and to me too, I believe. Although I may not be quite as refined aesthetically as he is … I can appreciate the beauty of a flower. At the same time, I see much more about the flower than he sees. I could imagine the cells in there, the complicated actions inside, which also have a beauty. I mean it’s not just beauty at this dimension, at one centimeter; there’s also beauty at smaller dimensions, the inner structure, also the processes. The fact that the colors in the flower evolved in order to attract insects to pollinate it is interesting; it means that insects can see the color. It adds a question: does this aesthetic sense also exist in the lower forms? Why is it aesthetic? All kinds of interesting questions which the science knowledge only adds to the excitement, the mystery and the awe of a flower. It only adds. I don’t understand how it subtracts.”
? Richard P. Feynman